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Vol. 30. Núm. 7.
Páginas 375-380 (Agosto 2007)
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Vol. 30. Núm. 7.
Páginas 375-380 (Agosto 2007)
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Acceso a texto completo
Computed tomography colonography compared with conventional colonoscopy for the detection of colorectal polyps
Validación de la colonoscopia virtual frente a la colonoscopia convencional para el diagnóstico de pólipos y tumores colorrectales
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María Chaparro Sáncheza,??
Autor para correspondencia
mariachs2005@gmail.com

Correspondence: Dra. M. Chaparro Sánchez. Americio, 17, PE, 2.° C. 28029 Madrid. Spain.
, Lourdes del Campo Valb, José Maté Jiméneza, José Cantero Peronaa, Antonio Barbosab, Sam Khorramia, Ricardo Moreno-Oteroa, Javier P. Gisberta
a Department of Gastroenterology and Hepatology. University Hospital La Princesa. Madrid. Spain
b Department of Radiology. University Hospital La Princesa. Madrid. Spain
Contenido relaccionado
Gastroenterol Hepatol. 2008;31:710.1016/S0210-5705(08)71264-0
Gastroenterol Hepatol. 2008;31:7410.1016/S0210-5705(08)71277-9
Información del artículo
Abstract
Objective

To determine the diagnostic accuracy of computed tomography colonography (CTC) compared with conventional colonoscopy (CC).

Methods

Patients with an indication of CC were included. Fifty patients underwent CTC using multidetector CT before diagnostic colonoscopy was performed by an expert colonoscopist. Diagnostic accuracy was assessed individually both for each polyp and for each patient.

Results

Fifty patients were included and 40 polyps were analyzed. The by-polyp sensitivity of CTC was 15% for polyps 5mm or less, 75% for polyps 5-10mm and 75% for polyps 10mm or larger. By-patient specificity was 6% for polyps 5 mm or less, 75% for polyps 5-10mm and 80% for polyps 10mm or larger. The specificity of CTC was 94%. CTC was preferred over CC by 90% of the patients. The mean colonoscopy examination time was 30 minutes for CC and 35 minutes for CTC (p<0.05).

Conclusions

The sensitivity of CTC is moderate in detecting polyps larger than 10 mm, low in detecting 5-10 mm polyps and very low in detecting those less than 5 mm. The overall specificity of the procedure was 94%. Procedure time was lower with CC than with CTC but the latter was better tolerated by most patients.

Objetivo

Determinar la exactitud diagnóstica de la colonoscopia virtual (CV) comparada con la colonoscopia convencional (CC).

Métodos

Se incluyeron pacientes con indicación de CC. Se les realizó una CV y, posteriormente, se llevó a cabo la CC sin sedación por parte de un colonoscopista experto. El análisis del rendimiento diagnóstico se efectuó tanto individualmente para cada pólipo como por paciente.

Resultados

Se han incluido 50 pacientes, y se contabilizó un total de 40 pólipos. La CV tuvo una sensibilidad del 15% para pólipos menores de 5mm, aumentó hasta el 75% para pólipos de entre 5 y 10mm, y fue del 75% para los mayores de 10mm. La sensibilidad respecto al diagnóstico de pacientes con lesiones fue del 6% para pólipos menores de 5mm, del 75% para pólipos de 5-10mm y del 80% para los mayores de 10 mm. La especificidad de la colonoscopia virtual fue del 94%. La CV fue la exploración preferida por el 90% de los pacientes. La duración media de la CC fue de 30min, mientras que la de la CV fue de 35min (p<0,05).

Conclusiones

La CV es una técnica moderadamente sensible para la detección de pólipos mayores de 10 mm; dicha sensibilidad desciende considerablemente en los pólipos de 5-10mm y es muy baja para los menores 5mm. La especificidad global de la prueba ha sido del 94%. La duración de la CC fue menor que la de la CV, y esta última fue mejor tolerada por la mayoría de los pacientes.

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